diff --git a/src/Concept/Model.php b/src/Concept/Model.php
new file mode 100644
index 0000000..d6f836d
--- /dev/null
+++ b/src/Concept/Model.php
@@ -0,0 +1,18 @@
+<?php
+namespace ProVM\Concept;
+
+use ProVM\Concept\Model\Factory;
+
+interface Model
+{
+    public function setFactory(Factory $factory): Model;
+    public function getFactory(): Factory;
+    public function setId(int $id): Model;
+    public function getId(): int;
+    public function setNew(): Model;
+    public function isNew(): bool;
+    public function setDirty(): Model;
+    public function isDirty(): bool;
+    public function save(): void;
+    public function edit(array $data): void;
+}
diff --git a/src/Concept/Model/Factory.php b/src/Concept/Model/Factory.php
new file mode 100644
index 0000000..d92b166
--- /dev/null
+++ b/src/Concept/Model/Factory.php
@@ -0,0 +1,13 @@
+<?php
+namespace ProVM\Concept\Model;
+
+use Psr\Container\ContainerInterface;
+
+interface Factory
+{
+    public function setContainer(ContainerInterface $container): Factory;
+    public function getContainer(): ContainerInterface;
+    public function setNamespace(string $namespace): Factory;
+    public function getNamespace(): string;
+    public function get(string $repository_name): Repository;
+}
diff --git a/src/Concept/Model/Repository.php b/src/Concept/Model/Repository.php
new file mode 100644
index 0000000..9e5c9b9
--- /dev/null
+++ b/src/Concept/Model/Repository.php
@@ -0,0 +1,28 @@
+<?php
+namespace ProVM\Concept\Model;
+
+use ProVM\Concept\Database\Connection;
+use ProVM\Concept\Database\QueryBuilder;
+use ProVM\Concept\Model;
+
+interface Repository
+{
+    public function setConnection(Connection $connection): Repository;
+    public function getConnection(): Connection;
+    public function setQueryBuilder(QueryBuilder $builder): Repository;
+    public function getQueryBuilder(): QueryBuilder;
+    public function setFactory(Factory $factory): Repository;
+    public function getFactory(): Factory;
+    public function setup(): Repository;
+    public function setTable(string $table): Repository;
+    public function getTable(): string;
+    public function setColumns(array $columns): Repository;
+    public function addColumn(string $column): Repository;
+    public function getColumns(): array;
+    public function load(array $data): Model;
+    public function save(Model $model): void;
+    public function edit(Model $model, array $data): Model;
+    public function create(array $data): Model;
+    public function fetchById(int $id): Model;
+    public function fetchAll(): array;
+}